Head Gasket and P0016

P0016 - Deviation in crankshaft position sensor signal and camshaft position sensor signal (2 trip detection logic)
How did you identify and find this code?

 

If it were off a tooth would it run rough? Possible something disconnected?

 

How smooth is the engine running? If it's running well, the chain is likely correct.
It doesn't just suddenly jump a tooth unless the tension fails, or something else fails.
You can pull the valve cover off, put the engine at TDC(for intake) and check the postion
of the cams. No, the colored link likely won't be in the picture, unless you are really lucky!
If the cam sprockets are in the correct postion, I would suspect the cam and/or crank sensor(s).

But since this appeared after replacing the head gasket, it could be a loose connection, or broken
wire? You might want to clean the connections also.

 

If you slip off the crankshaft "pulley" / harmonic damper and peek just so past the end of the shaft and the oil seal, you are able to make out the timing dot and whether the yellow colored link is next to it.



And of course the cam sprockets are easily visible just by taking the valve cover off.

Avoid the mistake of expecting the painted links to be on their marks every time you look. On a gen 3, once out of every nine times you see the painted links go by, they will be on their alignment marks. As long as you don't have to crank the chain more than nine times all the way around and you see them in position once, it's ok. If you've seen them come around nine consecutive times and never all on their marks, it's not ok,

 

?? The connectors for the cam and crank sensors.... Since that's where the issue is.
But it doesn't hurt to check them all, Make sure no pins are bent. And check the wire harness.
Did you have an issue with them before you replaced the head gasket? If not, you know it has
to be something you did or didn't do. You could have easily pinched a wire, everything is tight with
the harness.